Incubator ventilating means



Patented July 19, 1927.

UNITED {STATES DAVID M. -HOLBROOK, or PORTLAND, onn'eon.

inounn'ro'n VENTILATING MEANS.

Application filed August 26, 1926. sci-m1 No. 131,707.

The invention aims, to provide a new and iHIPTOYGCl ventilatingmeans forincubators, in which novel provision is made for regulating the amountof fresh air entering the same, or for entirely cutting oil suchentrance of air if desired.

lVith the foregoing in View the invention resides in the novel subjectmatter hereinafter described and claimed.

Figure l is a longitudinal section through an incubator embodying myinvention.

Figure 2 is a horizontal sectional view on line 2-2 of Figure 1.

Figure 3 is a vertical transverse section on line 3-3 of Figure 1.

In the drawings above briefly described, C designates the casing of anincubator having the usual trays T, dividing it into an upper hatchingcompartment H and a lower 510 or brood compartment B.

Extending from the exterior to the interior of the casing, at. suitablelocations above the trays T, are a number of horizon-7 tal tubes 5, saidtubes preferably passing through the rear wall of the casing C andextending toward the front of the latter,'butterminating in spacedrelation with said front. Thesetubes are open at both ends and they maybe secured in place in any desired manner, within the openings 6 formedfor their reception.

Slides 7 engage the front ends of the tubes 5, said slides being eachpreferably formed from a sheet metal plate transversely curved intochannel form. The outer or front ends of these slides have disks 8secured thereto and when said slides are tele-' scoped with the tubes 5to the maximum, said disks close the inner ends of said tubes 40 toprevent entrance of outside air. The

slides however may be forwardly or inwardly moved into numerous spacedrelations with the inner ends of the tubes 5, so that air entering saidtubes may be received in the channel shaped slides and may dischargethrough the open sides of the latter.

These slides preferably open upwardly so that the incoming air Will notimmediately descend upon the eggs, but must first pass V 5 upwardly overthe edges of the slides, so

that itwill become preheated. However, the slides may be rotated todischarge the ingoing air in any desired directions.

I prefer to secure small rods 9 to the disks 8 and to pass these rodsthrough openings 10 in the front of the incubator, so that the slides-n'1'ay be regained from the exterior oftlie casing C. The front endsoftliesc rods are preferably bent laterally to provide operating handles11, by means of which the slides 7 may be either slid or rotated, asdesired. I

Any desired air escape means may be provided for the casing C, but Iprefer to make use of short vertical tubes 12 passing through the topthereof and having their upper ends controlled by appropriate slides 13.These tubes preferably project to some extent into the compartment H, toprevent air entering through tubes 5, from short circuiting andprematurely discharging through said tubes 12. 7

It will be seen from the foregoing that simple and inexpensive, yeteflicient means have been provided for ventilating incubators, and whilethe details disclosed are preferable, it will be understood thatVariations may be made within the scope of the inventioneas claimed. Forinstance, While the slides 7 are preferably resilient to frictionallyengage the tubes 5 and thereby be held in any position in which they areset, it will be understood that other provisions can be made for holdingsaid slides in adjusted position. Moreover while the adjustin rods 9 arepreferably employed, they coul be omitted and the slides adjustedbyreaching into the casing C.

I claim 1. In an incubator ventilating means, a tube projecting from onewall of the incubator into the interior of the latter, said tube beingopen at both ends and having its outer end in communication with theatmosphere, a slide engaging the inner end of said tube and transverselycurved into channel form, a disk carried by the end of said slide remotefrom said one wall, said disk being of a size to close said inner end ofsaid tube when the slide is inwardly forced to the maximum, and a rodcoaxial with the aforesaid tube, said rod being connected with saidslide andpassing through an opening in the wall of the incubator remotefrom the aforesaid Wall, whereby said slide may be adjusted from theexterior of the incubator.

2. In an incubator ventilating means, a tube projecting from one wallofthe incubator into the interior of the latter, said tube being open atboth ends and having its outer end in communication with the atmosphere,a slide both slidably and rotatably engaging the inner end of said tubeand transversely curved into channel form, anda disk carried by the endof said slide remote from said one wall, said disk being of a size toclose said inner end of said tube when the slide is inwardly forced tothe maximum, rotating of said slide with respect to the tube; serving todischarge the ingoing air in any desired direction.

3. A structure as specified in claim 2; together with a rod co-axialwith the tube,

said rod being secured at one end to said disk and having its other endpassed slidahly and rotatably through an opening in a wall of theincubator opposite the aforesaid wall, the outer end of said rod havinga lateral handle, permitting both sliding and rotary movement of the rodto similarly move the slide.

In testimony whereof I have hereunto af- 2 fiXe d my signature.

D. M. HOLBROOK.

